code: def get_icnet_resnet50_citys(**kwargs):
      r"""Image Cascade Network
  
      Parameters
      ----------
      dataset : str, default citys
          The dataset that model pretrained on. (default: cityscapes)
      backbone : string
          Pre-trained dilated backbone network type (default:'resnet50').
  
      """
      return get_icnet(dataset="citys", backbone="resnet50", **kwargs)
  
imports: from __future__ import division
  from mxnet.gluon import nn
  from mxnet.context import cpu
  from mxnet.gluon.nn import HybridBlock
  from gluoncv.model_zoo.segbase import SegBaseModel
  from gluoncv.model_zoo.pspnet import _PSPHead
label_desc: Use image node_id 2 for calling a global function with example usage: get_icnet_resnet50_citys() and returns: get_icnet